**Source URL:** https://limited.veevavault.dev/sitevault/vault-sdk/services/job-service # Job Service Jobs allow developers to define and asynchronously execute a series of tasks. Jobs also allow for scheduling, so these tasks can repeatedly execute. Before developing with jobs, make sure you are familiar with the [Glossary of Job Terms](https://platform.veevavault.help/en/lr/22897/#glossary-of-job-terms). A job developed with Vault Java SDK is called an SDK job. In the Vault UI, this is a job definition with the type SDK Job. Creating an SDK job has the following steps: 1. **Developers Create a Custom Job Processor**: This contains the logic to execute for the job. Learn more about how to [develop a custom job processor](/sitevault/vault-sdk/entry-points/job-processors/). 2. **Vault Admins Create SDK Job Metadata**: Before you can use a custom job processor in a Job definition, you must define additional metadata for the SDK job in a [Jobmetadata component](/sitevault/mdl/component-types/jobmetadata). This metadata provides additional information needed to define the job. For example, this metadata defines the job `queue` and the `chunk_size` and defines which job processor to use in the `job_code` attribute. Learn more about [creating SDK job metadata in Vault Help](https://platform.veevavault.help/en/lr/64660). Executing an SDK job has different steps for developers and Vault Admins: * **Developers Execute Jobs with JobService**: Developers can use `JobService` to initiate jobs from custom Vault Java SDK code. Only job processors that are configured in the `@JobInfo` annotation as `adminConfigurable` are available to execute from custom Vault Java SDK code. Learn how to . * **Vault Admins Configure a Job Definition**: Vault Admins can run an SDK job by configuring it in the Vault UI as a job definition. Only job processors that are configured in the `@JobInfo` annotation as `adminConfigurable` will appear in the Vault UI for configuration. Learn more about [configuring an SDK job definition in Vault Help](https://platform.veevavault.help/en/lr/22897/#Define_SDK_Jobs). See the [Javadocs](https://repo.veevavault.com/) to learn more about the other interfaces in the `job` package and to see example code. ## SDK Job Limits The following limitations apply to SDK jobs per Vault: * The maximum chunk size is 500 `JobItem` instances. * The maximum size of a `JobTask` is 128 KB. * The maximum number of `JobTask` instances is 5000. * The maximum size of `JobParameters` is 8 KB. * The maximum number of `JobParameters` instances is 8000. * The maximum number of `Job` queues is 25. * The maximum number of queued SDK `Job` instances is 1000. ## Creating Job Processors Job processors provide logic to process jobs in bulk. A job processor is a Java class that implements the `Job` interface and has the `@JobInfo` annotation. The `@JobInfo` annotation has the following attributes: * `adminCancellable`: Determines if this job processor permits the cancellation of job instances which are in the `QUEUED` or `QUEUEING` state. This does not fully control the ability for a job instance to be cancelled, for example, jobs in the `SCHEDULED` state can always be cancelled. Learn more about [jobs eligible for cancellation in Vault Help](https://platform.veevavault.help/en/lr/24762). You can use [Vault API](/sitevault/vault-api/api-reference/26.2/jobs/retrieve-job-status) or [VQL](/vql/query-targets/jobs#Job_Instances) to retrieve the status of a job instance. * `adminConfigurable`: Determines if this job processor is available for Vault Admins to configure as a [Job Definition in the Vault UI](https://platform.veevavault.help/en/lr/22897) and if custom SDK code can invoke this job processor. * `idempotent`: Indicates if this job processor is idempotent. * `isVisible`: Determines if a job will appear in the *Scheduled*, *Running*, and *History* tables in the Job Admin UI. Learn more about the Vault UI’s [Job Status page in Vault Help](https://platform.veevavault.help/en/lr/24762). You can [invoke a job processor using triggers and actions](/vault-sdk/services/job-service/#Executing_Jobs) in Vault Java SDK code. A job processor can also form the logic for a new job definition. Learn more about [job definitions in Vault Help](https://platform.veevavault.help/en/lr/22897). You can use the `Job` interface with the following methods to create a job processor: * The `Job#init` method prepares data and performs other initialization logic. * The `Job#process` method executes tasks on the previously initialized data. * The `Job#completeWithSuccess` method runs if all previously processed tasks completed successfully. * The `Job#completeWithErrors` method runs if any of the previously processed tasks encountered errors. You must associate your custom job processor with a job by adding it to the *Job Code* field of an *SDK Job Metadata* record, which corresponds to the `job_code` field of the [Jobmetadata component](/sitevault/mdl/component-types/jobmetadata). Learn more about [administering SDK job metadata in Vault Help](https://platform.veevavault.help/en/lr/64660). The following is a basic skeleton of a job processor: ```java @JobInfo(adminConfigurable = true, idempotent = true, isVisible = true) public class CustomSdkJob implements Job { public JobInputSupplier init(JobInitContext context) { } public void process(JobProcessContext context) { } public void completeWithSuccess(JobCompletionContext context) { } public void completeWithError(JobCompletionContext context) { } } ``` ## Executing Jobs You can use `JobService` to initiate a job from custom Vault Java SDK code. To initiate a job from code, you must first define the job parameters. The `JobParameters` interface provides methods to set the start time, title, and parameter values for the job. To set a job parameter value, you can pass a String to `JobParameters#setValue`. Alternatively, the `JobParamValue` interface allows you to create more complex job parameter values. For example, the following code creates a custom job parameter value for record IDs: ```java @UserDefinedClassInfo() public class CustomSdkJobParameters implements JobParamValue { private List recordIds; public List getRecordIds() { return recordIds; } public void setRecordIds(List recordIds) { this.recordIds = recordIds; } } ``` After defining the job parameters, identify the job to run by passing the name of the `Jobmetadata` component for the job to the `JobService#newJobParameters` method. The following example identifies the job as `custom_sdk_job__c` and sets the job parameters with the user-defined `CustomSdkJobParameters` value. It then calls `JobService#run` to start the job 2 minutes after invocation. This calls the job processor associated with `custom_sdk_job__c`. ```java public void updateRecordsAsynchronously(List recordChanges) { JobService jobService = ServiceLocator.locate(JobService.class); List recordIds = VaultCollections.newList(); recordChanges.forEach(recordChange -> recordIds.add(recordChange.getNew().getValue("id", ValueType.STRING))); if (!recordIds.isEmpty()) { JobParameters jobParameters = jobService.newJobParameters("custom_sdk_job__c"); CustomSdkJobParameters customSdkJobParameters = new CustomSdkJobParameters(); customSdkJobParameters.setRecordIds(recordIds); jobParameters.setValue("custom_parameters", customSdkJobParameters); jobParameters.setJobRunTime(ZonedDateTime.now().plusMinutes(2)); jobService.run(jobParameters); } } ``` --- **Previous:** [URL Service](/sitevault/vault-sdk/services/url-service) **Next:** [QueueService](/sitevault/vault-sdk/services/queue-service)